The 16th Missouri Infantry Regiment (also known as Jackman's Missouri Regiment, Caldwell's Missouri Regiment, and the 7th Missouri Infantry Regiment (Lewis')) was an infantry regiment that served in the Confederate States Army during the American Civil War. The regiment was formed from men recruited by Jeremiah V. Cockrell and Sidney D. Jackman during an expedition into Missouri in August 1862. Although the recruits fought at the Battle of Lone Jack on August 16, they were not officially mustered into Confederate service until August 31. The regiment fought at the Battle of Prairie Grove on December 7. In May 1863, the regiment was designated the 7th Missouri Infantry Regiment, although this designation was changed to the 16th Missouri Infantry Regiment in December. On July 4, the regiment